All Games Keep Crashing?

[FrozenVirus]

Well, I'm not sure what category this should go under, as I have no clue what the source of the problem is.

Anyways, I've recently had a problem where I'd be playing a game (any game, I've tried it with BF2, COD4, COD2, even StarCraft and Combat Arms), and after around 5-15 minutes, it'd crash to the desktop without warning and without any error messages.

The source of the problem may be the virus I just got a few days a go, but I'm pretty sure I got rid of that as my computer seems to function perfectly now (except for this problem)

My specs are:

AMD Athlon 64 3500+ ~2.2 Ghz performance clocked at 3.5 Ghz
Phoenix - Award WorkstationBIOS v6.00PG
2046MB of RAM
BFG Tech Geforce 6600 GT OC
160 GB of Disk Space

Sure it's not the best computer, but it hasn't failed me until now.

Any ideas?

[PeckerWood]

You appear to have an overheating problem with your CPU,or your
graphics card. Have you cleaned inside your computer lately?

Have your Temperatures reported higher than normal lately?

[FrozenVirus]

I'll go clean out my computer, but it does not seem to be overheating as temperature levels are normal.

[FrozenVirus]

I downloaded Everest, but it only gives me temperatures for my GPU and Hard drive, for some reason. Anyways, my GPU's idle temperature is around 60-62 degrees Celsius O_o and the hard drive is between 38-40.

Oh yeah, and I also discovered that it doesn't only randomly close games, it happens with other applications like MSN messenger and Everest too....Oddly enough, Limewire, DAEMON Tools, Spy Sweeper, and Kaspersky are never affected....

And sometimes when I run applications (it happened once with Ad-Aware by Lavasoft and once with Everest Ultimate Edition), my computer reboots without warning.

O_O